September 29, 2010

Body Mass Index

Patient A: weight 70 kg, height 168 cm.
Patient B: Weight 120 kg, height 174 cm


1) Demonstrate how do you take the body weight and height for the patient
2) Calculate the BMI of the patient and comment on the finding.


Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, overweight and obesity in adults. It is defined as the weight in kilograms divided by the square of the height in metres (kg/m2)

Taking the weight

- Make sure that the weighting scale is set to zero.
- Remove all the accessories from body. The best is to naked but for patient’s modesty, wear a shirt and pants.
- Ask the patient to stand on the weighting scale in normal anatomical position.
- take the reading with one decimal point.

Taking the height.

- Ask patient to stand upright and still
- measure the height in inch first and look at the other side of the measuring tape which is in cm. this is to reduce error.
- convert the reading to meter.

BMI classification.

18.5 or less Underweight
18.5 to 24.99 Normal Weight
25 to 29.99 Overweight
30 to 34.99 Obesity (Class 1)
35 to 39.99 Obesity (Class 2)
40 or greater Morbid Obesity


  1. salam there. what a nice blog you have. i bumped onto this blog while searching for something (which i forgot). keep up the good work. may everyone of us will benefit from what you have posted here and i believe that He will reward you Inshalla.

    all the best to you!


  2. Wa'alaikum salam

    thank you for visiting "My Medical Notes" blogspot. pray for me so that i will be given strength by almighty allah s.w.t to continue writing and sharing..

    please pray so that i'm able to finish my undergrad time soon and achieve my dream.

    may Allah bless you sis.. all the best in your journey too

  3. yessss. keep on writing! i am sure you will be doing just fine :) thanks for your wish too. fyi, im in the middle on my final pro. pray for me, so that i'll pass with flying colours. iA


  4. InsyaALLAH sis. may Allah open your hearts and mind and made everything easy for you in the exam..

    looking forward to see you as a new muslim doctor after the exam. all the best, may GOD bless you


Ya Allah! Permudahkanlah aku untuk menuntut ilmuMu, memahaminya, mengingati dan menyebarkannya. Berkatilah ilmu itu dan tambahkanlah ia. Amin.